PEM® floating self-clinching nuts, which include non-locking Type A4 nuts with free running load-bearing threads as well as self-locking Type LA4 nuts with prevailing torque locking threads, install in stainless sheets as thin as .038 in. and greater with Rockwell B hardness of HRB 88 or less. Design permits up to .015 in. min float in all directions from center, and ability of fastener threads to extend fully into their retainer shank imparts strength and support in assembly.